When I use Cultris' window mode under Win XP, I get some weird horizontal graphical shifts, every time I drop a piece. I used paintbrush to illustrate the effect:

Under Win 7 or in fullscreen mode, everything is fine. Has anybody else encountered this problem? Does anybody know a solution? I don't want always switching to Win 7 - and then realizing, that there isn't anybody anymore on the official server. I have tried every setting of my notebook's graphic card. (Note that my notebook has a hybrid graphics card, the Geforce doesn't work under Win XP)

No, I meant, that it is like some block of lines (about 20 pixels high) are shifted 1 pixel to the left, others to the right. But when I make a screenshot you don't see it.

No, it's only during those shakes. But normally the whole playing field is shifted by some pixels. My problem is, that only some lines are shifted, others not - at least it looks like this. And that is annoying.

Sorry, I don't know, how to change the language, but you speak German, don't you? I assume the values in the lower image are for OpenGL. I can change the Vertical Sync value to on or off, but this doesn't help. And those settings shown seem to be the only relevant ones.

Thank you for your effort. I should use more google. I bought a notebook with Geforce, because I made bad experiences with a radeon ( gamma correction and also vertical sync ). Perhaps I should have informed myself before the purchase, wether the Geforce would work in Win XP, too. But probably I will get used to it after a while.